Ukrainian comedian and presidential candidate Volodymyr Zelenskiy, center, and his wife Olena Zelenska celebrate a victory with their supporters. (Photo;AP)

Ukrainian comedian and presidential candidate Volodymyr Zelenskiy speaks to the media and his supporters at his headquarters after the second round of presidential elections in Kiev, Ukraine. (Photo:AP)

Ukrainian comedian and presidential candidate Volodymyr Zelenskiy speaks to the media at his headquarters after the second round of presidential elections in Kiev. (Photo:AP)

Ukrainian comedian and presidential candidate Volodymyr Zelenskiy, and his wife Olena Zelenska smile as they greet supporters at his headquarters after the second round of presidential elections in Kiev, Ukraine. (Photo:AP)

Ukrainian comedian and presidential candidate Volodymyr Zelenskiy, center right, and his wife Olena Zelenska, center left, kiss each other after the second round of presidential elections in Kiev, Ukraine. (Photo:AP)

Ukrainian comedian and presidential candidate Volodymyr Zelenskiy, center right, congratulates each other at his headquarters after the second round of presidential elections in Kiev, Ukraine. (Photo:AP)

Ukrainian comedian and presidential candidate Volodymyr Zelenskiy shows his ballot before casting his ballot at a polling station, during the second round of presidential elections in Kiev, Ukraine. (Photo:AP)

Ukrainian presidential candidate and popular comedian Volodymyr Zelenskiy gestures after the final debate of the electoral campaign with Ukrainian President Petro Poroshenko. (Photo:AP)

Ukrainian presidential candidate and popular comedian Volodymyr Zelenskiy, left, and Ukrainian President Petro Poroshenko participate in their final electoral campaign debate at the Olympic stadium in Kiev, Ukraine. (Photo:AP)